anomalyco/openauth

OpenAuth is a standards-based auth provider for web apps, mobile apps, single pages apps, APIs, or 3rd party clients. It is currently in beta.

If you just want to get started as fast as possible you can jump straight into the code examples folder and copy paste away. There are also SST components for deploying everything OpenAuth needs.

While there are many open source solutions for auth, almost all of them are libraries that are meant to be embedded into a single application. Centralized auth servers typically are delivered as SaaS services - eg Auth0 or Clerk.

OpenAuth instead is a centralized auth server that runs on your own infrastructure and has been designed for ease of self hosting. It can be used to authenticate all of your applications - web apps, mobile apps, internal admin tools, etc.

It adheres mostly to OAuth 2.0 specifications - which means anything that can speak OAuth can use it to receive access and refresh tokens. When a client initiates an authorization flow, OpenAuth will hand off to one of the configured providers - this can be third party identity providers like Google, GitHub, etc or built in flows like email/password or pin code.

Because it follows these specifications it can even be used to issue credentials for third party applications - allowing you to implement "login with myapp" flows.